Hi,I had recently started working on an amazonsite but have ditched it in favor of clickbank. Using a method from here, I got about 90 clicks to the website but no sales yet. I guess it was because the topic was too wide (weight loss) and people are fed up of buying new things every few months.So, I now want to focus on micro niche sites based on clickbank. But I do not understand the process of keyword researching. Any good guide or tool that you would recommend?Thanks in advance.